14... b7b5 Removing the knight from its excellent post. 15. c4a3 A good retreat. 15... d8b6  16. c1f4  16... f8e8 This type of position is sometimes seen in the Grunfeld Defense. White has the pair of bishops and a strong passed pawn, but Black is not without chances with a queenside pawn majority and the idea of blockading the pawn with Ne8-d6 or attacking it with Rad8.